By Samia Nakhoul and Parisa Hafezi DUBAI (Reuters) – Commanders from Iran’s Islamic Revolutionary Guards Corps (IRGC) and Lebanon’s Hezbollah group are on the ground in Yemen helping to direct and oversee Houthi attacks on Red Sea shipping, four regional and two Iranian sources told Reuters. Iran – which has armed, trained and funded the Houthis – stepped up its weapons supplies to the militia in the wake of the war in Gaza, which erupted after Iranian-backed militants Hamas attacked Israel on Oct. 7, the four regional sources said. Tehran has provided advanced drones, anti-ship cruise missile…